module modexpng_storage_block
(
clk, clk_bus, rst,
wr_wide_xy_ena,
wr_wide_xy_bank,
wr_wide_xy_addr,
wr_wide_x_din,
wr_wide_y_din,
wr_narrow_xy_ena,
wr_narrow_xy_bank,
wr_narrow_xy_addr,
wr_narrow_x_din,
wr_narrow_y_din,
rd_wide_xy_ena,
rd_wide_xy_ena_aux,
rd_wide_xy_bank,
rd_wide_xy_bank_aux,
rd_wide_xy_addr,
rd_wide_xy_addr_aux,
rd_wide_x_dout,
rd_wide_y_dout,
rd_wide_x_dout_aux,
rd_wide_y_dout_aux,
rd_narrow_xy_ena,
rd_narrow_xy_bank,
rd_narrow_xy_addr,
rd_narrow_x_dout,
rd_narrow_y_dout
);
//
// Headers
//
`include "modexpng_parameters.vh"
//
// Ports
//
input clk;
input clk_bus;
input rst;
input wr_wide_xy_ena;
input [ BANK_ADDR_W -1:0] wr_wide_xy_bank;
input [ OP_ADDR_W -1:0] wr_wide_xy_addr;
input [ WORD_EXT_W -1:0] wr_wide_x_din;
input [ WORD_EXT_W -1:0] wr_wide_y_din;
input wr_narrow_xy_ena;
input [ BANK_ADDR_W -1:0] wr_narrow_xy_bank;
input [ OP_ADDR_W -1:0] wr_narrow_xy_addr;
input [ WORD_EXT_W -1:0] wr_narrow_x_din;
input [ WORD_EXT_W -1:0] wr_narrow_y_din;
input rd_wide_xy_ena;
input rd_wide_xy_ena_aux;
input [ BANK_ADDR_W -1:0] rd_wide_xy_bank;
input [ BANK_ADDR_W -1:0] rd_wide_xy_bank_aux;
input [ NUM_MULTS_HALF * OP_ADDR_W -1:0] rd_wide_xy_addr;
input [ OP_ADDR_W -1:0] rd_wide_xy_addr_aux;
output [ NUM_MULTS_HALF * WORD_EXT_W -1:0] rd_wide_x_dout;
output [ NUM_MULTS_HALF * WORD_EXT_W -1:0] rd_wide_y_dout;
output [ WORD_EXT_W -1:0] rd_wide_x_dout_aux;
output [ WORD_EXT_W -1:0] rd_wide_y_dout_aux;
input rd_narrow_xy_ena;
input [ BANK_ADDR_W -1:0] rd_narrow_xy_bank;
input [ OP_ADDR_W -1:0] rd_narrow_xy_addr;
output [ WORD_EXT_W -1:0] rd_narrow_x_dout;
output [ WORD_EXT_W -1:0] rd_narrow_y_dout;
//
// Internal Registers
//
reg rd_wide_xy_reg_ena = 1'b0;
reg rd_wide_xy_reg_ena_aux = 1'b0;
reg rd_narrow_xy_reg_ena = 1'b0;
always @(posedge clk)
//
if (rst) begin
rd_wide_xy_reg_ena <= 1'b0;
rd_wide_xy_reg_ena_aux <= 1'b0;
rd_narrow_xy_reg_ena <= 1'b0;
end else begin
rd_wide_xy_reg_ena <= rd_wide_xy_ena;
rd_wide_xy_reg_ena_aux <= rd_wide_xy_ena_aux;
rd_narrow_xy_reg_ena <= rd_narrow_xy_ena;
end
//
// Helper Signals
//
wire [BANK_ADDR_W + OP_ADDR_W -1:0] rd_wide_xy_offset[0:NUM_MULTS_HALF-1];
wire [BANK_ADDR_W + OP_ADDR_W -1:0] rd_wide_xy_offset_aux;
wire [BANK_ADDR_W + OP_ADDR_W -1:0] rd_narrow_xy_offset;
wire [BANK_ADDR_W + OP_ADDR_W -1:0] wr_wide_xy_offset;
wire [BANK_ADDR_W + OP_ADDR_W -1:0] wr_narrow_xy_offset;
assign rd_wide_xy_offset_aux = {rd_wide_xy_bank_aux, rd_wide_xy_addr_aux};
assign rd_narrow_xy_offset = {rd_narrow_xy_bank, rd_narrow_xy_addr};
assign wr_wide_xy_offset = {wr_wide_xy_bank, wr_wide_xy_addr};
assign wr_narrow_xy_offset = {wr_narrow_xy_bank, wr_narrow_xy_addr};
//
// "Wide" Storage
//
genvar z;
generate for (z=0; z<NUM_MULTS_HALF; z=z+1)
begin : gen_wide_bram
//
assign rd_wide_xy_offset[z] = {1'b0, rd_wide_xy_bank, rd_wide_xy_addr[z*OP_ADDR_W +: OP_ADDR_W]};
//
modexpng_sdp_36k_x18_wrapper wide_bram_x
(
.clk (clk),
.ena (wr_wide_xy_ena),
.wea (wr_wide_xy_ena),
.addra (wr_wide_xy_offset),
.dina (wr_wide_x_din),
.enb (rd_wide_xy_ena),
.regceb (rd_wide_xy_reg_ena),
.addrb (rd_wide_xy_offset[z]),
.doutb (rd_wide_x_dout[z*WORD_EXT_W +: WORD_EXT_W])
);
//
modexpng_sdp_36k_x18_wrapper wide_bram_y
(
.clk (clk),
.ena (wr_wide_xy_ena),
.wea (wr_wide_xy_ena),
.addra (wr_wide_xy_offset),
.dina (wr_wide_y_din),
.enb (rd_wide_xy_ena),
.regceb (rd_wide_xy_reg_ena),
.addrb (rd_wide_xy_offset[z]),
.doutb (rd_wide_y_dout[z*WORD_EXT_W +: WORD_EXT_W])
);
//
end
endgenerate
//
// Auxilary Storage
//
modexpng_sdp_36k_x18_wrapper wide_bram_x_aux
(
.clk (clk),
.ena (wr_wide_xy_ena),
.wea (wr_wide_xy_ena),
.addra (wr_wide_xy_offset),
.dina (wr_wide_x_din),
.enb (rd_wide_xy_ena_aux),
.regceb (rd_wide_xy_reg_ena_aux),
.addrb (rd_wide_xy_offset_aux),
.doutb (rd_wide_x_dout_aux)
);
//
modexpng_sdp_36k_x18_wrapper wide_bram_y_aux
(
.clk (clk),
.ena (wr_wide_xy_ena),
.wea (wr_wide_xy_ena),
.addra (wr_wide_xy_offset),
.dina (wr_wide_y_din),
.enb (rd_wide_xy_ena_aux),
.regceb (rd_wide_xy_reg_ena_aux),
.addrb (rd_wide_xy_offset_aux),
.doutb (rd_wide_y_dout_aux)
);
//
// "Narrow" Storage
//
modexpng_sdp_36k_x18_wrapper narrow_bram_x
(
.clk (clk),
.ena (wr_narrow_xy_ena),
.wea (wr_narrow_xy_ena),
.addra (wr_narrow_xy_offset),
.dina (wr_narrow_x_din),
.enb (rd_narrow_xy_ena),
.regceb (rd_narrow_xy_reg_ena),
.addrb (rd_narrow_xy_offset),
.doutb (rd_narrow_x_dout)
);
modexpng_sdp_36k_x18_wrapper narrow_bram_y
(
.clk (clk),
.ena (wr_narrow_xy_ena),
.wea (wr_narrow_xy_ena),
.addra (wr_narrow_xy_offset),
.dina (wr_narrow_y_din),
.enb (rd_narrow_xy_ena),
.regceb (rd_narrow_xy_reg_ena),
.addrb (rd_narrow_xy_offset),
.doutb (rd_narrow_y_dout)
);
endmodule
